CN102852035A - Paper reinforcing agent, and production and usage method thereof - Google Patents
Paper reinforcing agent, and production and usage method thereof Download PDFInfo
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- CN102852035A CN102852035A CN2012103061830A CN201210306183A CN102852035A CN 102852035 A CN102852035 A CN 102852035A CN 2012103061830 A CN2012103061830 A CN 2012103061830A CN 201210306183 A CN201210306183 A CN 201210306183A CN 102852035 A CN102852035 A CN 102852035A
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Abstract
Paper reinforcing agent, and a production and a usage method thereof The production method is as below: subjecting office waste paper to flotation deinking; gaining waste residue containing ink, filler and 10-20wt% of fine fiber from a flotation tank; sieving the waste residue by a 100 mesh screen to obtain flotation deinking residue fiber; and then subjecting the flotation deinking residue fiber to carboxymethylation under alkalization conditions of NaOH and 60-90 v% of an ethanol solution. The obtained paper reinforcing agent has water retention value of 113.7g / 100g-175.0g / 100g, and carboxyl content of 40.0mmol / kg-87.8mmol / kg. During a paper production process, paper reinforcing agent 1-4wt% of the dry pulp is added to enhance the binding force between the pulp fibers, and improve the physical strength of paper. The flotation deinking waste residue is used as raw material to realize the comprehensive utilization of waste resources and reduce environmental pollution.
Description
Technical field
The present invention relates to the paper strengthening agent technical field, particularly, relate to a kind of paper strengthening agent that utilizes the preparation of floatation and ink removing slag fiber; The present invention relates to utilize floatation and ink removing slag fiber to prepare the production method of paper strengthening agent; The invention still further relates to the using method of the paper strengthening agent that utilizes the preparation of floatation and ink removing slag fiber.
Background technology
Along with improving constantly of the level of consumption, people are also more and more higher to the requirement of paper class and quality, and the raising of paper strength seems more and more important.How to improve the intensity of paper, satisfy people extremely urgent to low demand quantitative, high-grade paper.The raising of paper strength can be by pulling an oar, improve long stapled proportioning and realizing with reinforcing agent.By making beating with improve the intensity that ratio of long fiber improves paper and have more shortcoming, as power consumption is large, fiber filter is low, paper porosity reduces, deflection descends, tearability dies down etc.But then there are not the problems referred to above in the intensity that improves paper with reinforcing agent.In the paper industry, the use of paper making intensifier generally adopts inside to attach and outside covering with paint method.In general, paper strength be subjected between the intensity of pulp fiber own and the fiber or and coating between the impact of bond strength and area larger, the combination of paper pulp fiber then is that paper produces powerful main cause.Dry reinforcer molecular structures characteristics are the high molecular polymers that contain polyhydroxy, amido or carboxyl, this be and cellulosic molecule between form the basis of Hydrogenbond, be the main cause that works of reinforcing agent.
Do the enhancement mode paper strengthening agent and mainly contain the natural prodcuts such as starch, natural plant gum, develop into later on the semi-synthetic products such as starch derivatives, polyacrylamide, Carboxymethyl Cellulose.After using paper strengthening agent, can substitute high-grade wood pulp with the low-grade paper pulp of part, or improve the quality of products, reduce the papermaking cost.Some reinforcing agent also has stronger retention, filtrating aid function, can improve the retention of fiber fines and filler, reduces white water consistency, improves sizing efficiency.Yet general paper making intensifier is subject to it to the humidification of paper and adsorbs quantitative limitation at fiber surface, and limited to the raising of molecular level bonded area between fiber, the starch based reinforcing agent also will consume more grain resource.
Summary of the invention
In order to overcome the defective of prior art, on the one hand, the object of the present invention is to provide a kind of paper strengthening agent that utilizes the preparation of floatation and ink removing slag fiber, this reinforcing agent is used for improving interfibrous effective contact area, to strengthen the intensity of paper.
To achieve these goals, the paper strengthening agent that provides is provided in the present invention, by wastepaper behind floatation and ink removing, from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, described waste residue screens through 100 mesh sieves, and obtaining residue on sieve is floatation and ink removing slag fiber; Described floatation and ink removing slag fiber is under the alkalization condition of NaOH and 60V%～90V% ethanolic solution, make through the monoxone carboxy methylation, the water retention value of gained paper strengthening agent is that 113.7g/100g～175.0g/100g, carboxyl-content are 40.0mmol/kg～87.8mmol/kg.
Described floatation and ink removing slag contains the inorganic matters such as the organic matters such as paper pulp, printing ink and calcium carbonate, and ignition residue content is not higher than 79.5wt% under 600 ℃ of temperature; Ignition residue content is not higher than 49.5wt% under 900 ℃ of temperature.
On the other hand, in order to obtain aforementioned paper strengthening agent, the present invention also aims to provide a kind of production method of using floatation and ink removing slag fiber to produce described paper strengthening agent.Can fully utilize the discarded object in the pulp from decoloured waste paper production process, resource is fully utilized, reduce the pollution to environment.
To achieve these goals, the production method of paper strengthening agent provided by the invention may further comprise the steps:
S1: wastepaper is behind floatation and ink removing, and from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, and described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is floatation and ink removing slag fiber;
S2: described floatation and ink removing slag fiber is joined the suspension of making 5wt%～12wt% in 60V%～90V% ethanol;
S3: add the NaOH of described floatation and ink removing slag fiber 0.6～1.2 weight portion and the monoxone of 0.8～1.5 weight portion, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 20～60 times of 95V% of its weight again, described floatation and ink removing slag fiber obtains described paper strengthening agent through carboxy methylation after 70～150 minutes under 60～80 ℃ of temperature.
In addition, the present invention also provides a kind of using method of described paper strengthening agent: in paper making process, add the described paper strengthening agent of absolute dried paper pulp 1wt%～4wt%.
Further, the using method of described paper strengthening agent also is included in the paper making process, and the aluminum sulfate, the control online pH value that add absolute dried paper pulp 0.3wt%～0.7wt% are 5～6.
The beneficial effect that the present invention brings: adopt monoxone+alkali cellulose system, hydroxyl in the floatation and ink removing slag fiber is changed into carboxymethyl, when described paper strengthening agent adds to when manufacturing paper with pulp in the paper pulp, can strengthen the adhesion between the paper pulp fiber, thereby improve the physical strength of paper.Take wastepaper behind floatation and ink removing from flotation cell waste residue obtained above as raw material, realized the comprehensive utilization of waste material, reduced the pollution to environment.
The specific embodiment
Embodiment is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.
Embodiment 1: wastepaper is behind floatation and ink removing, from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, described waste residue screens through 100 mesh sieves, the residue on sieve that obtains is called floatation and ink removing slag fiber, and described floatation and ink removing slag fiber ignition residue content under 600 ℃ of temperature is 79.473wt%; Ignition residue content is 49.472wt% under 900 ℃ of temperature; Described floatation and ink removing slag fiber is joined in the ethanol of 60V%, make the suspension of 5wt%; Add the NaOH of described floatation and ink removing slag fiber 0.6 weight portion and the monoxone of 0.8 weight portion, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 20 times of 95V% of its weight again, described floatation and ink removing slag fiber under 60 ℃ of temperature through carboxy methylation 70 minutes, with 75V% ethanolic solution washed twice, with the washing of 95V% ethanolic solution once, filtration drying obtains described paper strengthening agent at last.The water retention value of the paper strengthening agent that obtains after tested, is that 113.7g/100g, carboxyl-content are 41.0mmol/kg.Poplar sulfate pulp water is discongested rear making beating to 40 ° SR, be diluted to 2 ‰ concentration, the aluminum sulfate that under stirring condition, adds absolute dried paper pulp 0.3wt%, regulate the pH value to 6 of slurry, add the paper strengthening agent that absolute dried paper pulp 1wt% the present embodiment makes, after stirring, copy by national standard Law and to get quantitative 60g/m
2Page.Behind 105 ℃ of lower slaking 20min, equilibrium water conten 24h under the constant temperature and humidity condition surveys its intensity by national standard.
Embodiment 2: wastepaper is behind floatation and ink removing, and from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, and described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is called floatation and ink removing slag fiber; Described floatation and ink removing slag fiber is joined the suspension of making 8wt% in the 70V%% ethanol, add the NaOH of described floatation and ink removing slag fiber 0.8 weight portion and the monoxone of 1.0 weight portions, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 30 times of 95V% of its weight again, described floatation and ink removing slag fiber is under 70 ℃ of temperature, through carboxy methylation 90 minutes, with 75V% ethanolic solution washed twice, with the washing of 95V% ethanolic solution once, filtration drying obtains described paper strengthening agent at last.The water retention value of the paper strengthening agent that obtains after tested, is that 175.0g/100g, carboxyl-content are 54.8mmol/kg.Poplar sulfate pulp water is discongested rear making beating to 40 ° SR, be diluted to 2 ‰ concentration, the aluminum sulfate that under stirring condition, adds absolute dried paper pulp 0.5wt%, regulate the pH value to 5 of slurry, add the paper strengthening agent that absolute dried paper pulp 3wt% the present embodiment makes, after stirring, copy by national standard Law and to get quantitative 60g/m
2Page.Behind 105 ℃ of lower slaking 20min, equilibrium water conten 24h under the constant temperature and humidity condition surveys its intensity by national standard.
Embodiment 3: wastepaper is behind floatation and ink removing, and from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, and described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is called floatation and ink removing slag fiber; Described floatation and ink removing slag fiber is joined the suspension of making 10wt% in the 80V% ethanol, add the NaOH of described floatation and ink removing slag fiber 1.0 weight portions and the monoxone of 1.2 weight portions, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 45 times of 95V% of its weight again, described floatation and ink removing slag fiber under 70 ℃ of temperature through carboxy methylation 110 minutes, with 75V% ethanolic solution washed twice, with the washing of 95V% ethanolic solution once, filtration drying obtains described paper strengthening agent at last.The water retention value of the paper strengthening agent that obtains after tested, is that 153.6g/100g, carboxyl-content are 67.8mmol/kg.Poplar sulfate pulp water is discongested rear making beating to 40 ° SR, be diluted to 2 ‰ concentration, the aluminum sulfate that under stirring condition, adds absolute dried paper pulp 0.5wt%, regulate the pH value to 5.5 of slurry, add the paper strengthening agent that absolute dried paper pulp 1wt% the present embodiment makes, after stirring, copy by national standard Law and to get quantitative 60g/m
2Page.Behind 105 ℃ of lower slaking 20min, equilibrium water conten 24h under the constant temperature and humidity condition surveys its intensity by national standard.
Embodiment 4: wastepaper is behind floatation and ink removing, and from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, and described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is called floatation and ink removing slag fiber; Described floatation and ink removing slag fiber is joined the suspension of making 12wt% in the 90%V% ethanol, add the NaOH of described floatation and ink removing slag fiber 1.2 weight portions and the monoxone of 1.5 weight portions, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 60 times of 95V% of its weight again, described floatation and ink removing slag fiber under 80 ℃ of temperature through carboxy methylation 150 minutes, with 75V% ethanolic solution washed twice, with the washing of 95V% ethanolic solution once, filtration drying obtains described paper strengthening agent at last.The water retention value of the paper strengthening agent that obtains after tested, is that 138.2g/100g, carboxyl-content are 87.8mmol/kg.Poplar sulfate pulp water is discongested rear making beating to 40 ° SR, be diluted to 2 ‰ concentration, the aluminum sulfate that under stirring condition, adds absolute dried paper pulp 0.7wt%, regulate the pH value to 5 of slurry, add the paper strengthening agent that absolute dried paper pulp 4wt% the present embodiment makes, after stirring, copy by national standard Law and to get quantitative 60g/m
2Page.Behind 105 ℃ of lower slaking 20min, equilibrium water conten 24h under the constant temperature and humidity condition surveys its intensity by national standard.
Reference examples: poplar sulfate pulp water is discongested rear making beating to 40 ° SR, be diluted to 2 ‰ concentration, under stirring condition, add the aluminum sulfate of absolute dried paper pulp 0.5wt%, regulate the pH value to 5 of slurry, after stirring, copy by national standard Law and to get quantitative 60g/m
2Page.Behind 105 ℃ of lower slaking 20min, equilibrium water conten 24h under the constant temperature and humidity condition surveys its intensity by national standard.
The sheet paper products that each embodiment and reference examples obtain, performance is as follows after tested:
By data in the table as can be known, along with floatation and ink removing slag fiber prepares carboxy methylation time, the sodium hydroxide concentration of paper strengthening agent, the increase of monoxone consumption, the dry tensile strength of paper, burst index and folding strength all rise first and reduce afterwards; Compare with reference examples, all increase obviously; After descending first, tearability slightly increases.This is that carboxyl-content increases gradually because the carboxy methylation time lengthens, and hydrogen bond increases between fiber, and adhesion increases, and folding strength and bursting strength also increase thereupon, and tear index constantly reduces.When the carboxy methylation condition violent, i.e. the increase of carboxy methylation time, sodium hydroxide concentration, monoxone consumption, though carboxyl-content increases, fiber destruction is serious, causes paper strengthening agent to strengthen effect and reduces.Preferred 90～110 minutes carboxy methylation time, has preferably technique effect.
The comparative example organizes one: on the basis of embodiment 3, change the addition of the paper strengthening agent that is made by embodiment 3, add respectively the paper strengthening agent of absolute dried paper pulp 0.5wt%, 2wt%, 3wt%, 4wt%, 5wt%.The sheet paper products that each reference examples obtains, performance is as follows after tested:
By data in the table as can be known, the increase of the paper strengthening agent addition that makes along with floatation and ink removing slag fiber, paper dry tensile strength, folding strength, bursting strength all present rise first after downward trend.Tear index then descends first and rises afterwards.The addition of the paper strengthening agent that optimum flotation deinking slag fiber makes is the 1wt%～4wt% of absolute dried paper pulp, has preferably technique effect.
The comparative example organizes two: on the basis of embodiment 2, regulate the addition of aluminum sulfate, the pH value of change slurry is 7 and 9.
By data in the table as can be known, be the 0.5wt% of absolute dried paper pulp in the addition of aluminum sulfate, pH is 5 o'clock, the paper performance that makes is better.
Substance, tensile index, tear index, burst index, folding strength among the present invention, test according to national standard (GB/T451.2-2002), national standard (GB/T 22898-2008), national standard (GB/T 455-2002) and national standard (GB/T454-2002), national standard (GB/T 457-2008) method respectively; The water retention value of paper strengthening agent adopts centrifugal process, document (Xianliang S. specifically sees reference, Kwei-Nam L..Oxidation of kraft pulp and its influence on the recycling characteristics of fibres.Cellulose Chemistry and Technology, 2010,44 (7-8): 265-270) carboxyl-content adopts By Means of Electrical Conductivity, document (Katz specifically sees reference, S., Beatson, R.P.and Scallan, A.M.Strong and Weak Acidic Groups in Sulfite Pulps, Svensk papperstidning, 1984 (6): R48～R53) test.
Obviously, the invention is not restricted to the above specific embodiment, also can in the spirit of claim of the present invention and specification restriction, carry out conversion and the improvement of various ways, can solve same technical problem, and obtain the technique effect of expection, therefore do not repeat.Those of ordinary skill in the art can be from content disclosed by the invention directly or all schemes of associating, as long as within the spirit that claim limits, also belong to protection scope of the present invention.
Claims (5)
1. paper strengthening agent, it is characterized in that: described paper strengthening agent by wastepaper behind floatation and ink removing, from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is floatation and ink removing slag fiber; Again by described floatation and ink removing slag fiber under the alkalization condition of NaOH and 60V%～90V% ethanolic solution, make through the monoxone carboxy methylation, the water retention value of gained paper strengthening agent is that 113.7g/100g～175.0g/100g, carboxyl-content are 40.0mmol/kg～87.8mmol/kg.
2. a production method for preparing the described paper strengthening agent of claim 1 is characterized in that, may further comprise the steps:
S1: wastepaper is behind floatation and ink removing, and from flotation cell waste residue obtained above, described waste residue comprises the fiber fines of printing ink, filler and 10wt%～20wt%, and described waste residue screens through 100 mesh sieves, and the residue on sieve that obtains is floatation and ink removing slag fiber;
S2: described floatation and ink removing slag fiber is joined the suspension of making 5wt%～12wt% in 60V%～90V% ethanol;
S3: add the NaOH of described floatation and ink removing slag fiber 0.6～1.2 weight portion and the monoxone of 0.8～1.5 weight portion, wherein said monoxone adds after being dissolved in and making solution in the ethanol of 20～60 times of 95V% of its weight again, described floatation and ink removing slag fiber obtains described paper strengthening agent through carboxy methylation after 70～150 minutes under 60～80 ℃ of temperature.
3. the production method of the described paper strengthening agent of claim 2, it is characterized in that: described floatation and ink removing slag fiber obtains described paper strengthening agent through carboxy methylation after 90～130 minutes.
4. the using method of the described paper strengthening agent of claim 1 is characterized in that: in paper making process, add the described paper strengthening agent of absolute dried paper pulp 1wt%～4wt%.
5. the using method of the described paper strengthening agent of claim 4 is characterized in that: in paper making process, the aluminum sulfate, the control online pH value that also add absolute dried paper pulp 0.3wt%～0.7wt% are 5～6.
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| CN103469688A (en) * | 2013-09-29 | 2013-12-25 | 北京林业大学 | Modification method of corncobs used as paper strengthening agents |
| CN103469689A (en) * | 2013-09-29 | 2013-12-25 | 北京林业大学 | Modification method of corncobs used as paper strengthening agents |
| CN103485238A (en) * | 2013-09-29 | 2014-01-01 | 北京林业大学 | Method for modifying corncobs to produce paper strengthening agent |
| CN105484094A (en) * | 2016-01-14 | 2016-04-13 | 河北昌泰纸业有限公司 | Low-gram-weight kraft paper produced from reclaimed waste paper and production process |
| CN106087561A (en) * | 2016-06-13 | 2016-11-09 | 北京林业大学 | A kind of paper strengthening agent and production method thereof |
| CN109162144A (en) * | 2018-08-15 | 2019-01-08 | 华南理工大学 | A kind of preparation method and application of paper and the wet strong synergist of paper products |
| CN109893010A (en) * | 2017-12-12 | 2019-06-18 | 株洲千金药业股份有限公司 | A kind of tender sensitivity skin paper of children and its method of the preparation of prescriptions worth thousand gold dregs of a decoction resource regeneration |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103469688A (en) * | 2013-09-29 | 2013-12-25 | 北京林业大学 | Modification method of corncobs used as paper strengthening agents |
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| CN103485238A (en) * | 2013-09-29 | 2014-01-01 | 北京林业大学 | Method for modifying corncobs to produce paper strengthening agent |
| CN103485238B (en) * | 2013-09-29 | 2016-04-06 | 北京林业大学 | The method of paper strengthening agent is prepared in a kind of corncob modification |
| CN103469689B (en) * | 2013-09-29 | 2016-04-20 | 北京林业大学 | The method of paper strengthening agent is prepared in a kind of corncob modification |
| CN103469688B (en) * | 2013-09-29 | 2016-04-20 | 北京林业大学 | The method of paper strengthening agent is prepared in a kind of corncob modification |
| CN105484094A (en) * | 2016-01-14 | 2016-04-13 | 河北昌泰纸业有限公司 | Low-gram-weight kraft paper produced from reclaimed waste paper and production process |
| CN105484094B (en) * | 2016-01-14 | 2017-05-17 | 河北昌泰纸业有限公司 | Low-gram-weight kraft paper produced from reclaimed waste paper and production process |
| CN106087561A (en) * | 2016-06-13 | 2016-11-09 | 北京林业大学 | A kind of paper strengthening agent and production method thereof |
| CN109893010A (en) * | 2017-12-12 | 2019-06-18 | 株洲千金药业股份有限公司 | A kind of tender sensitivity skin paper of children and its method of the preparation of prescriptions worth thousand gold dregs of a decoction resource regeneration |
| CN109162144A (en) * | 2018-08-15 | 2019-01-08 | 华南理工大学 | A kind of preparation method and application of paper and the wet strong synergist of paper products |
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